Coupon fan



FIG. 1 is a front elevation view of a coupon fan showing my new design;

FIG. 2 is a rear elevation view of the back side of the coupon fan shown in FIG. 1; and,

FIG. 3 is a side elevation view of the side of the coupon fan shown in FIG. 1. 

The ornamental design for a coupon fan, as shown and described. 